JP3031576U - Sound insulation board - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a sound insulating plate that is inexpensive and has excellent sound insulating properties. SOLUTION: The concrete board 1 and the concrete board 1
The sound insulation plate 10 is composed of the sound absorbing material 2 bonded to both surfaces of the sound insulation plate 10. The sound absorbing material 2 is a cementitious composition having an interconnected and open cellular structure, which is composed of an inorganic cement, an aggregate, water, and a foaming composition composed of a thin film forming agent and a foaming agent.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a sound insulating plate, for example, a sound insulating plate made of concrete used for soundproof walls of highways, subways and tunnels, walls of basements, and block walls.

[0002]

[Prior art]

 For example, on highways, a structure is widely adopted in which sound insulating plates are provided on both sides of the road in order to shield noise generated as a vehicle travels. Conventionally, as this type of sound insulating plate, for example, a cement plate that reflects noise to the road side, or a special sound absorbing structure that absorbs noise has been used.

[0003]

[Problems to be solved by the device]

 However, when a cement board is used as the sound insulation board, there is a problem that the sound insulation is poor because it is difficult to handle because of the heavy weight of the cement board and it simply reflects sound. In addition, there is a problem that the cost of the special sound absorbing structure is high.

An object of the present invention is to provide a sound insulation plate which is inexpensive and has excellent sound insulation.

[0005]

[Means for Solving the Problems]

 The sound insulation plate of the present invention is characterized by comprising a support plate and sound absorbing materials fixed to both surfaces of the support plate. As the support plate, a plate member having a required rigidity such as a concrete plate or a plastic plate is used.

As the above-mentioned sound absorbing material, for example, one having a cellular structure mainly composed of concrete can be used. More specifically, a sound absorbing material having a structure having open cells or closed cells on its outer surface and inner portion is used. As the above-mentioned sound absorbing material, a cementitious composition having an interconnected and open cell-like structure composed of an inorganic cement, an aggregate, water, and a foaming composition composed of a thin film forming agent and a foaming agent is used. To be More specifically, the sound absorbing material comprises about 100 parts by weight of inorganic cement, 10 to 350 parts by weight of the aggregate, about 35 to 150 parts by weight of the water, and 1 to 96 parts by weight of the film forming agent. The foaming agent is used in an amount of about 0.5 to 5 parts by weight.

As the inorganic cement, Portland cement, calcium cement, gypsum cement, magnesia cement and the like can be used. As the aggregate, a thermally expanded lightweight inorganic substance or sand is used. More specifically, perlite, vermiculite, expanded shale, clay and the like are used.

Thin film formers are used to increase foam stability and are cold water soluble organics, such as synthetic resin emulsions, that form thin films at room temperature and are compatible with the inorganic cement used. A compound is used. In this case, the synthetic resin emulsion preferably has a transition temperature of about 10 ° C to 25 ° C.

As the synthetic resin emulsion, specifically, an emulsion having a total solid content of 47% to 55% and confirmed as a good foam stabilizer is used. Such synthetic resin emulsion is used in the range of 1 to 96 parts by weight. More specifically, a homopolymer of vinyl acetate, a copolymer of acrylic vinyl acetate such as Polyco 2151 manufactured by Borden, a copolymer of vinyl chloride internally plasticized. , An externally plasticized vinyl chloride copolymer, a polyacrylic emulsion such as Rhoplex AC35 manufactured by Rohm & Hass, of carboxylic styrene-butadiene. It can be formed using a resin such as a copolymer, a vinyl chloride-vinylidene chloride copolymer, or a vinyl chloride-vinylidene chloride-acrylic tar polymer. Also, UCAR latex (Latex) 413 can be used.

The foaming agent is a nonionic surfactant or anionic surfactant or a mixture thereof. In use, these surfactants are mixed with the slurry of the aqueous foam composition of the present invention and are stabilized in the expanded and expanded state until the cement solidifies. The cement is then cured and dried to produce a lightweight, useful product. Here, the foaming action of the foaming agent is stabilized by the thin film forming agent.

In addition to the above, polyester fiber or glass fiber may be used together as a reinforcing fiber material, if necessary. In this case, these fibers are used as chopped or woven fabrics. Also, a known water reducing agent or plasticizer can be incorporated into the foaming composition.

Further, a configuration may be adopted in which fly ash is added. This fly ash is a useful additive when the cementitious composition is used in a salt-containing environment such as road, and can prevent the deterioration of the cementitious composition due to salt. Fly ash is also a versatile filler and is chemically inert. Thus, the inclusion of fly ash increases the fire resistance of the material and also improves the flowability of the mixed material while reducing the mixture resistance. Fly ash can be obtained as a derivative after burning coal in a power generator.

The foaming composition used for the sound absorbing material in the present invention contains a large amount of bubbles (air). Therefore, the cementitious composition of the present invention has a density lower than that of general concrete composed of inorganic cement and aggregate itself. In this case, the foam in the foam composition is introduced by mixing a slurry of inorganic cement, aggregate and water with the foam composition. That is, by including the foaming composition in the slurry, an excessive amount of air cells are formed in the slurry, and a large amount of bubbles are formed in the foaming composition after the cement is solidified. The cells are interconnected to form an open cell-like structure. As a result, the density of the cementitious composition can be reduced, and a lightweight cell-like cementitious composition having sound absorption, heat insulation, and fire resistance can be provided.

Further, in order to make the cementitious composition lighter in weight, it is necessary to incorporate more foam into the slurry, which is achieved by incorporating more foaming agent into the slurry. . Specifically, at least 20% -100% of the surface area of interconnected cellular structures within the composition can be released to provide good sound absorption properties.

The foamed cementitious composition of the present invention is formed into a desired shape by pumping, spraying, casting, and troweling, and has a density lower than that of conventional cements of inorganic cement and aggregate.

Further, in the present invention, since the sound absorbing material is fixed to both surfaces of the support plate, the sound insulating property is remarkably enhanced as compared with the case where the support plate is used alone, and the above structure is used as the sound absorbing plate. By using the concrete-based material that it has, it can be constructed inexpensively and lightly.

[0017]

[Embodiment of device]

 An embodiment of the sound insulating plate of the present invention will be described below.

FIG. 1 is a perspective view showing a sound insulation plate of the embodiment. The sound insulation plate 10 is formed by fixing the sound absorbing material 2 to the recesses 11 formed on both sides of the support plate 1 made of a concrete plate or a plastic plate by an adhesive or the like. As the concrete plate, a conventionally used material, for example, a portland cement and sand or water is used. As the plastic plate, a rigid plate made of thermosetting resin or the like is used.

The sound absorbing material 2 is fixed to the support plate 1 by using, for example, an adhesive. Alternatively, the sound absorbing material 2 may be fixed to the recess 11 by pouring and solidifying a slurry for forming the sound absorbing material 2 into the recess 11 of the support 1.

As the sound absorbing material 2, an inorganic cement such as Portland cement, calcium cement, gypsum cement and magnesia cement, an aggregate such as perlite, vermiculite, expanded shale and clay, and a slurry composed of water, A foaming composition consisting of a thin film forming agent consisting of synthetic resin emulsion and a foaming agent consisting of a nonionic surfactant or anionic surfactant or a mixture thereof is mixed, and the foamed inorganic inorganic cement is foamed. A cementitious composition that is formed by solidifying is used. In this case, about 100 parts by weight of inorganic cement, 10 to 350 parts by weight of aggregate, about 35 to 150 parts by weight of water, 1 to 96 parts by weight of thin film forming agent, and about 0.5 to 5 parts by weight of foaming agent. Within the range, sufficient air cells can be formed in the cementitious foam composition, and high sound absorption characteristics (sound insulation) can be provided.

The sound insulation plate 10 of the present invention having the above-described structure has a good sound insulation property due to the sound absorbing material 2. Further, the sound absorbing material 2 can form various surface patterns such as a wood grain look and a granite look by pouring the slurry into the form during manufacturing. Furthermore, by mixing a colorant during the mixing of the raw materials at the time of manufacturing, or by spray coating (for example, coating of acrylic latex polymer) after manufacturing, coloring according to the application, for example, in the installation environment is performed. Coloring can be easily performed according to the color, and water resistance and strength can be improved. Here, as the colorant, color pigments such as titanium oxide, iron oxide, ferric oxide, and chromium oxide are used.

Further, the sound absorbing material 2 can be formed into various surface patterns such as wood grain look, granite look, etc. by pouring into the form at the time of manufacturing. Furthermore, by mixing a colorant when mixing the raw materials during the manufacturing of the sound absorbing material 2, or by spraying (acrylic coating) after manufacturing, coloring according to the application, for example, to match the color of the installation environment Coloring can be done easily.

The sound insulating plate of this embodiment can be used, for example, as a wall facing a road where noise is generated, or for consumer use, for example, as a wall or ceiling of a fence or basement.

[0024]

[Effect of device]

 According to the present invention, since the sound absorbing material is fixed to both surfaces of the support plate and the concrete sound absorbing plate is used, it is possible to provide a sound insulating plate which is inexpensive and has excellent sound insulating properties.

[Brief description of drawings]

FIG. 1 is a perspective view of a sound insulation plate according to an embodiment of the present invention.

[Explanation of symbols]

 1 Support Plate 2 Sound Absorbing Material 10 Sound Insulation Plate 11 Recess

Claims (4)

[Scope of utility model registration request] 1. A sound insulation plate comprising a support plate and sound absorbing materials fixed to both surfaces of the support plate. 2. The sound insulating board according to claim 1, wherein the sound absorbing material has a cellular structure mainly composed of concrete. 3. A cementitious composition wherein the sound absorbing material has an interconnected and open cell-like structure comprising an inorganic cement, an aggregate, water, and a foaming composition composed of a thin film forming agent and a foaming agent. It is a thing, The sound-insulating board of Claim 1 or 2 characterized by the above-mentioned. 4. The sound absorbing material, wherein the inorganic cement is about 100 parts by weight, the aggregate is 10 to 350 parts by weight, the water is about 35 to 150 parts by weight, the thin film forming agent is 1 to 96 parts by weight, and The sound insulating board according to claim 1, 2 or 3, wherein the foaming agent comprises about 0.5 to 5 parts by weight.